$def with ()
<form id="password" action="" method="POST">
<table>
<tbody>
    <tr>
        <td><label for="email">邮箱</label></td>
        <td><input type="text" id="email" name="email" /><span class="validate_tip" id="email"></span></td>
    </tr>
    <tr>
        <td><input type="submit" id="find_btn" value="确定" /></td>
        <td><span class="submit_tip"></span></td>
    </tr>
</tbody>
</table>
</form>
